Light protective additive based on organic/inorganic hybrid polymer, method for its manufacture and use thereof

Abstract

Light protective additive based on a polybranched organic/inorganic hybrid polymer manufactured by a sol-gel process and method for its manufacture, having a chemical structure: R 1 -R 4 may be hydrogen, unsubstituted saturated or unsaturated C 1 -C 24 alkyl, substituted saturated or unsaturated alkyl, substituted or unsubstituted aryl, halogen, hydroxyl, substituted or unsubstituted amine, aliphatic or aromatic carbonyl, or where R 1 -R 4 are chosen among the condensation products or addition products of one or more types of chemical compositions such as acids, alcohols, phenols, amines, aldehydes, or epoxides.

The invention claimed is: 
     
       1. Method for the manufacture of a polybranched organic/inorganic hybrid polymer suitable as a light protective additive in a total process comprising a sol-gel process in which hydrolysable metal compounds with functional amino groups are reacted in a first step comprising the formation of a core under controlled and complete hydrolysis and condensation with a silane of formula:
   NH 2 —B—Si(—Y) 3  
 
 
       where B is a linkage group chosen among saturated or unsaturated C 1 -C 18  alkylene, substituted or unsubstituted arylene, in which the carbon chains may include one or more branches and/or that one or more carbon atom may be substituted by the elements oxygen, nitrogen, sulphur, silicon, and boron, while Y is a hydroysable residue; and wherein the total process comprises at least one additional step in which one or more of said functional amino groups are reacted with an aromatic carboxylic acid derivative comprising a group with a proton donating ability in ortho position to the carboxylic acid derivative group. 
     
     
       2. Method as claimed in  claim 1 , wherein the aromatic carboxylic acid derivative is chosen among: 
       
         
           
           
               
               
           
         
       
       where R 1 -R 4  are selected from the group consisting of hydrogen, unsubstituted saturated or unsaturated C 1 -C 24 -alkyl, substituted saturated or unsaturated C 1 -C 24 -alkyl, substituted or unsubstituted aryl, halogen, hydroxyl, substituted or unsubstituted amine, aliphatic and aromatic carbonyl, while one or more carbon atoms in the carbon chains of said compounds can be substituted by one or more elements selected from the group consisting of oxygen, nitrogen, sulphur, phosphorus, silicon, and boron, or where R 1 -R 4  are chosen among the condensation products or addition products of acids, alcohols, phenols, amines, aldehydes, and epoxides, and where R 1 -R 4  can form substituted or unsubstituted aromatic ring structures that, together with the existing aromatic ring, form a larger ring structure than phenyl, while M, Z are chosen among O and S, and where R 5 -R 7  are chosen among R 1 —O, R 1 R 2 N or R 1 —S. 
     
     
       3. Method as claimed in  claim 2 , wherein the carboxylic acid derivative is chosen so that the polybranched organic/inorganic hybrid polymer suitable as light protective additive is water dispersible. 
     
     
       4. Method as claimed in  claim 2 , wherein two or more of R 1 -R 4  can contribute to extend the aromatic ring structure to a ring structure with more than 6 π-electrons. 
     
     
       5. Method as claimed in  claim 1 , wherein in the at least one subsequent step, UV absorbing branches are developed by reacting two groups B—NH 2  with one carboxylic acid derivative comprising one of said chemical structures: 
       
         
           
           
               
               
           
         
       
       where R 1 -R 4  are selected from the group consisting of hydrogen, unsubstituted saturated or unsaturated C 1 -C 24 -alkyl, substituted saturated or unsaturated C 1 -C 24 -alkyl, substituted or unsubstituted aryl, halogen, hydroxyl, substituted or unsubstituted amine, aliphatic and aromatic carbonyl, while one or more carbon atoms in the carbon chains of said compounds can be substituted by one or more elements selected from the group consisting of oxygen, nitrogen, sulphur, phosphorus, silicon, and boron, or where R 1 -R 4  are chosen among the condensation products or addition products of acids, alcohols, phenols, amines, aldehydes, or epoxides and where R 1 -R 4  can form substituted or unsubstituted aromatic ring structures that together with the existing aromatic ring form a larger ring structure than phenyl, while M, Z are chosen among O and S, and where R 5 -R 7  are chosen among R 1 —O, R 1 R 2 N or R 1 —S. 
     
     
       6. Method as claimed in  claim 5 , wherein some —B—NH 2  groups are reacted in pairs with carboxylic acid derivatives and that the remaining —B—NH 2  groups wholly or partially are reacted individually with carboxylic acids or carboxylic acid derivatives. 
     
     
       7. Method as claimed in  claim 5 , wherein the —B—NH 2  groups are only partially reacted so that two —B—NH 2  groups chemically react with a carboxylic acid derivative, and that the remaining —B—NH 2  groups react wholly or partially to attach at least one stabilizer to a polybranched, particulate, organic/inorganic hybrid polymer and that in such reactions, selective compounds comprising epoxides, cyclic and non-cyclic acid derivatives, blocked and unblocked isocyanates, compounds with reactive double bonds, aldehydes, ketones and proton donating compounds comprising or being attached to suitable stabilizers and stabilizing groups are used, comprising antioxidants and/or radical scavengers, comprising phenols, 2,6-substituted phenols, compounds comprising 2,2,6,6-tetramethylpiperidine and where the —B—NH 2  group can be attached to a certain stabilizer. 
     
     
       8. Method as claimed in  claim 5 , wherein B is propylene, Z is oxygen, R 1 -R 4  are hydrogen.